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20578 (1999 RH149)
Classification: Main-belt Asteroid          SPK-ID: 2020578
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0275565521637183 3.8164e-08  
a 3.016452294360414 1.8248e-08 au
q 2.933329269361504 1.1879e-07 au
i 10.21033866631883 4.7974e-06 deg
node 157.4938525247643 2.5486e-05 deg
peri 112.0303736798536 0.00010137 deg
M 336.8397947145896 9.7028e-05 deg
tp 2458723.607077797415
(2019-Aug-28.10707780)
0.00051548 TDB
period 1913.564558729874
5.24
1.7365e-05
4.754e-08
d
yr
n .1881305746166983 1.7072e-09 deg/d
Q 3.099575319359325 1.8751e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1095  
   data-arc span      10913 days (29.88 yr)  
   first obs. used      1989-10-07  
   last obs. used      2019-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54899  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:30:09  

Additional Information
 Earth MOID = 1.93449 au 
 Jupiter MOID = 1.9473 au 
 T_jup = 3.223 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO492968  
diameter diameter 5.145 km 0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.202   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20578 (1999 RH149)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RH149 = 1989 TK7 = 1998 KT53 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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